Furnace.



W. J. KENNEY.

FURNACE.

APPLICATION FILED JUNE'13. 1910,

LWQ QQO, Patented Feb.22,1916.

5 SHEETS-SHEET I.

W. J. KENNEY.

FURNACE.

APPLICATION FILED JUNE 13, 1910.

Patented Feb; 22,1916.

5 SHEETS-SHEET Z.

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-.EEEEEEEQ W. J. KENNEYJ FURNACE.

APPLICATION FILED JUNE 13, 1910.

1,17%,29Q. Patented; Feb. 22,1916.

5 SHEETS-SHEET 3.

' \XQQQ W. KENNEY.

I FURNACE.

APPLICATION FILED JUNE 13, 1910.

5 SHEETSSHEET 5.

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WILLIAIVI J. KENNEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO UNDERFEED STOKER COMPANY OF AMERICA, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.'

FURNACE.

To all whom it may concern:

Be it known that I, WILLIAM J. KENNEY,

a citizen of the United States, residing at Chicago, county of Cook, State of Illinois,

have invented a certain new and useful Im-.

. provement in Furnaces, and declare thefollarly objectionable where the clinkers and ashes are to be discharged adjacent to one of the walls so that an adhering mass of clinkers at this point interferes with the ejecting means.

The principal object of my invention is to produce an arrangement of furnace walls which will prevent the adherence of clinkers thereto. r

A further object of my'i-nven'tionis to produce a simple and novel furnace con-a struction which shall be efficient in operation and durable.

The various features of novelty whereby my inventionis characterized will hereinafter be pointed out with particularity in the claims; but for a full understanding of my invention, and of its object and ad-' vantages, reference may be had to the following detailed description taken in connection with the accompanying'drawings, wherein:

Figure 1 is a longitudinal section through a furnace arranged in accordance with a preferred form of my invention; Fig. 2 is a view partly in plan and partly in section;

Fig. 3 is a transverse section taken near the I extreme front end of the furnace; Fig. 4 is a. section taken on line 44 of-Fig. 3; Fig 5 is a section on an enlarged scale through one of the side walls of the furnace and the acent portion of the fuel supporting means; and Fig. 6.is a view similar to Fig. 1 showing a modification.

Referring to Figs. 1 to 5 of the drawings,

A ,respresents a furnace having side walls A and A a front wall A and a rear wall A. Within the furnace are two retorts B and B forming parts of wellknown types Specification of Letters Patent.

Patented Feb. are, rare.

Application filed June 13,1910. SerialNo. 566,534.

' of underfeed stokers, thetops of the retorts being-inclined downwardly from the front to the rear. Each of the side walls of the furnace has an overhanging portion extending into proximity to the adj acent retort and serving to support one side of a dead plate closing the gap between it and the retort; In the arrangement shown, the overhanging portions are composed in part of members a, and a which may be made of masonry or 6 other material of which the walls are constructed, together Withmetallic member C and C which lie between the members a and a respectively, and the retorts. In rear of the retorts is a hollow bridge wall D, preferably of cast iron. The members C and C extend from the front wall of the furnace to the bridge-wall and theymay conveniently be supported by-means of I-beams E and E and beams F and F", the latter 7 being illustratedv as being in the form 'of channel'irons. The beams E and E are embedded at their front ends in the front wall of the furnace and at their rear ends'rest against the front of the bridge wall.

.members' F and F are also-embedded at The their front ends'in the front wall of the furnace, while 'at their rear endsthey are a supported upon low piers G and G; The

retorts are supported from beneath upon girders, H and H, while the rear ends thereof rest upon a transverse girder which may conveniently extend between the piers and have its endsembedded therein as indicated at i. The members a and a of the over-hanging portions of theside walls extendback to the rear of the bridge wall so that the space beneath the same communicates with the interior ofthe bridge wall through the open ends thereof. J is a plate extending downwardly from the rear ends of the retorts to the bottom of the furnace; this plate extending from pier to pier so as to form the rear wall of an airwell beneath the retorts. As will be seen, most clearly in Figs. 2 and 5, each of the retorts has laterally projecting flanges b at the top thereof, these flanges being'provided with openings 7) extending therethrough.

B are twyer blocks arranged upon the flanges along the inner'edges thereof, the blocks being held in place by means of ears 5 which extend down through the openings b, the ears being as wide as the openings so as to hold the blocks against play, but

ashes which are deposited upon the dead mounted between the member I and the beingthin so as not materially to obstruct the opening. These twyer blocks may be of any suitable construction and will therefore not be described in detail.

Between each retort and the a-djacent wall of the furnace is a dead plate, these being indicated at K and K. Each of these dead plates rests upon the flange of the adja -dead plate are connected together by a long bar K which is in turn connected with an operating crank K by means of a link K When the crank arms K are oscillated, the

two dead plates are reciprocated and the dogs are oscillated, so that the clinkers and plates are fed toward the rear end of the furnace. Between the two retorts is a third dead plate K? which may be similar to the other two and need not,-therefore, cifically described. These dead plates and the actuating means therefor are similar to those described and claimed in an application filed ,by Henry P. Grohn and myself on October 12, 1908, Serial No. 457,199; and therefore, since the present invention does not depend upon any particular dead plateconstruction, I deem it unnecessary further to describe the construction illustrated.

The member I is spaced apart from the bridgewall so that an ash chute is formed by these members and the plate ,J, together with the two piers,'directly in rear of the retorts. Thus the piers G and G and the members I and J serve as partition walls co operating with the bridge wall to form a discharge passage or ash chute separated from the air chamber below the retorts.

' This ash chute may openinto a suitable pit A. Upon the top of the member I is a piece I'having a shearing edge parallel with-the bridge wall.

L is a reciprocable shearing member bridge Wall so as to cooperate with the mem ber I to break or shear the clinkers when they are fed rearwardly beyond the stationary member. As seen in Fig. 2, the bridge wall is provided with T-shaped guide lugs d on its front face while the member L is provided with-correspondingly shaped slots Z which receive the guide lugs.?-. .Consequently the member L may be moved up and down along the front of the bridge wall.

without danger of being displaced. The member L may be connected to crank arms M by means of links Z so that when the crank arm is oscillated the member L will be .spe-

be reciprocated. Ipreferto incline the front face of the bridge wall so as to bring it i approximately at right anglesv with the dead plates and thereby cause the shearing memberto reciprocate ina path'at right angles to the dead plates. The crank arms M'may be connected to or form part of a transverse shaft M mounted in suitable bearings M beneath the member I. By properly proportioning the bearing members M they may be made to serve as supports upon which the member I rests, so that the member I is supported not only at its ends but also at intermediate points. The shaft M is provided with a crank arm M and a connecting rod M extends between this crank arm and a crank arm N formed upon or secured to the transverse shaft N. The crank arms K are secured to a transverse shaft K which is provided with a downwardly projecting crank arm K. The shaft as an upwardly projecting crank arm N which .is' connected to the arm K by means of a link N The shaft N is oscillated in' any suitable manner as, for exam- .ple, bymeans of a piston rod N connected to the arm N. It will be seenthat as the piston rod reciprocates, the shaft N is oscillated so that the feeding mechanism for the clinkers and ashes is moved back and forth and, the moving shearing member caused to travel up and down.

It will be seen that the space beneath the retorts and the dead plates, the space beneath the over-hanging walls, and the space, within the bridge wall are intercommunieating so as'to form a large air chamber into which air may be forced under pressure to supply to the furnace the air necessary for combustion. It will furthermore be seen that the air in this chamber comes in contact with the metal above the retorts and the dead plates in front and at the sides thereof so" that a cooling action on these walls is produced and they are prevented from warping or burning out under the intense heat of the furnace. This permits the walls to be made of 'a material, such as cast iron, to which the partly'molten clinkers will not adhere, so that the clinkers and ashes will readily travel toward the rear endof the furnace and there be discharged through'the ash chute 'without danger of clogging. The air may be supplied in any suitable manner, but I prefer to introduce it into the interior of the bridge wall, at which point the heat is probably the greatest. This may conven-.

walls projecting I -of air.

plates and the retorts and finally passes upwardly into the combustion chamber through the twyer blocks. In the; arrangement shown, the conduit-O lies somewhat in rear of the,bridge wall so that the air flowing through the passage 0, impinges directly against the hottest portion ofthe bridge wall. A damper 0 may be placed: within the passageway 0' so as to regulate the flow The specific furnace which I have illustrated is one in which the width of the furnace is considerably greater than the neces sary width of the fuel-support, so that a a large addition to the air space beneath the retorts is afforded by the overhanging portions a and a of the furnace walls. It is evident that where there is less room in the furnace, the depth of the overhanging portions a and a may of course be diminished,

or these portions may be eliminated, leavingonly the metallic members C and C.

In Fig. 6 I have illustrated a-modification in which the furnace P is provided with two stokers or sets of stokers arranged end to end with a hollow bridge wall Q, between f them. Rand It represent the fuel-sup- -porting members of the two'stokers which terminate a short distance from the bridge wall. S and S are ejecting members for clinkers and ashes arranged between the bridge wall and the members R and. R respectively; Air may be introduced into the hollow bridge wall through a suitable pipe T. In the particular arrangement shown,

there is no communication between the interior of the bridge wall and the airchambers U and U beneath the members R and It and therefore, in order to insure circulation of the air within the bridge wall, I provide it with an opening 9 which will permit some of the air to escape into the combustion chamber. g'is a gate or valve associated with the port or opening 9 for the purpose of varying the elfective size of this opening when desired. In thisarrangement as in theother the bridge wall may be made of cast iron to which the clinkers will not adhere, so that the clinkers.

and ashes may readily be ejected at the rear ends of the stokers.

While I have described in detail only two preferred forms of my invention, I do not desire to be limited to these particular forms or to the details of construction illustrated and described; but intend to cover all forms and arrangements which fall within the terms employed in the definitions of my in vention constituting the appended claims.

What I claim is 1. In a furnace, a support for a bed of fuel arranged within the furnace, a hollow bridge wall arranged in rear of and spaced apart from the support, means arranged between the bridge wall and said support for discharging clinkers and ashes downwardly from the support, a partition wall at each side'of said support adjacent to the bridge wall, a third partition wall, at the rear of'sa-id support, the partition walls extending downwardly so as to confine the 'discharging'clinkers and ashes to the space dlrectly in rear of the support, metal walls projectingabove said support at each side thereof, "there being passageways leading from the ends of the hollow bridge wall around the outside of the, said metallic walls and the side partition walls andinto the space beneath said support, and means for introducing airinto the interior of said bridge wall.

2. ha furnace, a support for a bed of fuel extending across. the same and dividing it into two compartments comprising an upper combustion chamber and a lower air well,'a hollow bridge wall arranged in rear of and separated from said support, a downwardly extending partition at the rear of said support for closing the rear-end of the air-well and forming with the bridge wall a discharge chute for the reception of clinkers and ashes from said support, and

therebeing passageways leading. from the ends of said bridge wall into the air well so as to form an air sp'ace including both the interior of the bridge wall and the air well,

and means for introducing air into said space.

3. In a'furnace, a support for a bed of fuel arranged in the furnace, and separating it into a combustion chamber and an air well, a downwardly extending partition wall at the rear end of said support for closing the rear end of the air well, a hol low open-ended bridge wall in rear of said a,

support and spaced apart from said partition wall, two side walls arranged between the ends of said partition wall and of said bridge wall so as to form a discharge chute for clinkers and ashes in rear-of said support, there being' passageways connecting the sides of the. air well with the ends of said bridge wall so as to form an air space including the air well and the interior of the bridge, wall, and means for introducing air into said space.

4. In a furnace, a support for a bed, of fuel arranged in the furnace and separating it into a combustion. chamber and an air well, a downwardly extending partition wall at the rear end of said support for closing the rear end of the air well, a hol- 45 support for closing the rear end of the air low open-ended bridge wall in rear of said support and spaced apart from said parti- .tion wall, two side walls arranged between for clinkers and ashes -in rear of said support, there being passageways connecting the sides of the air well with the ends of said bridge wall so as to form an air space v including the air well and the interior of the bridge wall, means for introducing air into said space, and means arranged within said chute for ejecting clinkers and ashes into the same. 4

5. A furnace having side walls undercut on theinner sides thereof so as to-form longitudinally-extending over-hanging portions, a support for a bed of fuel extending between said over-hanging portions so as to divlde the furnace into a combustlon chamber and-an a1r well, a downwardly extending partition wall at the rear'end of the support for closing the rear end of the air well, a hollow bridge wall arranged in rear of said support and spaced apart from said partition wall, means extending between the ends of said partition wall and bridge wall for forming therewith a discharge chute in rear of said support and separated from the air well, the ends of said bridge wall opening into the. space beneath said over-hanging portions outside of said chute so as to form an air chamber including the space beneath said support and said over-hanging portions and the space within said bridge wall, and means for introducing air into said air chamber. 6. A furnace having side walls undercut on the inner sides thereof so as to form longitudinally-extending over-hanging portions, a support for a bed of fuel extending between said over-hanging portions so as to divide the furnace into a combustion chamber and an air well, a downwardly extending partition wall at the rear end of the well, a hollow bridge wall arranged in. rear ofsald support and spaced apart from said partition wall, means extending between the ends of said partition wall and bridge wall for forming therewith a discharge chute in rear of said support and separated from the air well, the ends of said bridge wall opening into the space beneath said over-hanging portions outside of said chute so as to form an air chamber including the space beneath said support and said over-hanging portions and the space within said bridge wall, means'fo'r. introducing air into said air chamber, and means associated with said.

support for moving the clinkers andashes resulting from combustion toward said chute.

7. A furnace having side walls under-cut on the inner sides thereof so as to form lon-' ing partition wall at the rear end of the support for closing the rearend 0f the air well, a hollow'bridge wall arranged in rear of said support and spaced apart from said partition wall,-means extending between the ends-of said partition wall and bridge wall.

for forming therewith a discharge chute in rear of said support and separated from theair well, the ends of said bridge wallopening into the space beneath saidover-hanging portions outside of said chute so as to form an air chamber including-the space beneath said support and said over-hanging portions and the space within said bridge wall, means for introducing air into said air chamber,means associated with said support for moving the clinkers and ashes resulting from combustion toward said chute, and means adjacent to the mouth of said chute for ejecting the .clinkers and ashes into the chute when the clinkers and ashes reach the rear end of said support.

8. In a furnace, two separated beams extending lengthwise within the furnace near each side thereof, the outermost beams being arranged above the inner beams,a support for a bed of fuel arranged within the furnace and resting at its sides upon the in-- nor beams, a hollow metallic bridge wall arranged in rear of and projecting above said support, metal side walls resting upon each 7 pair of beams and with the said support dividing the furnace into an air well and a' combustion chamber, there being passages leading from the interior of the bridge. wall into the space beneath the sidewalls, and means for introducing air under pressure in ;o the interior of the bridge wall.

9. In a furnace, a support for a bed of ofsaid support, the side walls of the furnace being undercut in the vicinity of the said support so as to extend said air chamber laterally beyond the sides of said support, the

'side portions of said air chamber extending back to thebridge wall and communicating with the interior thereof, and means for introducing air under pressure into the interior of said bridge wall.

'10. In combination, a furnace, a retort for fuel arranged within the furnace, supports beside the retort for receiving clinkers and ashes therefrom, said retort and said supllC ports cooperating to divide said fnrnace into an upper combustion chamber and a'lower air ohamber, a hollow metallic bridge Wall jspaeedfapart. irorhath-rear end of the re tortand'the supports and projecting above the same; means'for-foreing air under pressure through said hollow bridge Wall, mech- .anis mf fo'r delivering fuel to said retort, means for feeding clinkers and ashes along said supports toward said bridge Wall and means slidable up and down along the face of thebridge Wall for positively forcing the elinkersand ashes down into the space be tweenthe bridge \Vitll and said supports as the clinkers and ashes are delivered in proxunity to sand space.

In testimony whereof, I sign this specification in the presence of two .vitnesses,

. WILLIAM J; KENNEY.

-Witnesses:

WM. F. FREUDENRmc-H, RUBY V. BRYDGES. 

